# 154.56.136.11 — IP Intelligence Summary

154.56.136.11 is an IPv4 address announced by AS34977, with approximate network location Madrid, Spain. Its reverse DNS name is 11.red.136.56.154.procono.es. As of November 12, 2026, IPDebrief rates it Low Risk (0/100); no anonymizing service was detected.

- Canonical page: https://ipdebrief.com/154.56.136.11
- Last updated: 2026-11-12

## Ownership

- Organization: Cogent Communications, LLC
- Network name: COGENT-154-56-16
- Allocated block: 154.56.0.0/16
- ASN: AS34977 (https://ipdebrief.com/asn/34977)
- Regional registry: AFRINIC
- Registered holder: Cogent Communications, LLC
- Routing operator: —
- Network registration country: United States
- Registrant address country: —

## Location

- City: Madrid
- Region: Madrid
- Country: Spain
- Time zone: Europe/Madrid

Approximate network location; registration and certificate addresses are not server-location evidence.

## Network classification

- Infrastructure type: —
- Datacenter / hosting: no
- Residential: no
- Mobile: no
- Anycast: Unverified (not proof of unicast)
- Tor exit node: no
- VPN: no
- Proxy: no

## Risk assessment

- Assessment: Low Risk (0/100)
- Blocklist listings: 0
- Suspicious activity indicators: no
- Spam source: no

## Reverse DNS

- 11.red.136.56.154.procono.es
- Forward-confirmed: no

## DNS posture

Mail authentication and CAA are optional domain policies, not IP-wide requirements.

- spf: Not checked
- dmarc: Not checked
- fcrDns: Not checked
- dnssec: Not checked
- caa: Not checked

## Nearby addresses

- 154.56.136.6 (https://ipdebrief.com/154.56.136.6)
- 154.56.136.7 (https://ipdebrief.com/154.56.136.7)
- 154.56.136.25 (https://ipdebrief.com/154.56.136.25)
- 154.56.136.59 (https://ipdebrief.com/154.56.136.59)
- 154.56.136.89 (https://ipdebrief.com/154.56.136.89)
- 154.56.136.121 (https://ipdebrief.com/154.56.136.121)

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Source: IPDebrief, "154.56.136.11 IP intelligence", https://ipdebrief.com/154.56.136.11, updated 2026-11-12. Assessments are probabilistic.